Why do some on the highway continue to the next exit, yet some don't? Why do some of the exit ramps continue as on-ramps, while others just die out? Is there some logic to this? It just seems so random.

If I'm reading this correctly, then I think it's just simply a matter of distance between ramps. Some are close enough that it is easier or necessary to connect them. Others, like the one to get to the Bryan Target are so dang long that it's just not practical to connect them.

Consistency would be nice. When they have the comments open for widening the bypass, I will give my 2 cents on connecting as many as possible, and redesigning the harvey southbound exit. Some consistency of the feeder speed limits would be nice also.